Ichthyosaurs: the dolphin reptiles

When you think about the large creatures you might see in the ocean, perhaps whales and sharks come to mind. The fossil record suggests that the diversity of large, ocean-dwelling animals in earth's past included many other groups, such as marine reptiles known as ichthyosaurs. Ichthyosaurs lived during the Mesozoic era of earth's history, appearing in the fossil record …

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